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a8de32da KM |
1 | static char sccsid[] = "@(#)mwrite.c 4.1 (Berkeley) %G%"; |
2 | ||
3 | /* sccs id variable */ | |
4 | static char *mwrite_sid = "@(#)mwrite.c 1.2"; | |
5 | /* | |
6 | ||
7 | Mwrite provides the "response" function in the network. | |
8 | It sends its standard input to "toaddress", either by opening | |
9 | his terminal and writing on it, or by mailing it to him. | |
10 | It is executed by a remote machine from netdameon.c, either for a | |
11 | response to be sent back or an errormsg to be sent back. | |
12 | It excutes mmail locally if it needs to. | |
13 | ||
14 | Archaic Usage: | |
15 | mwrite toaddress ttystr lutmptime fmach fuser [command ltimeSent] | |
16 | ||
17 | New Usage: | |
18 | mwrite [-t toaddress] [-f fromaddress] [-x lutmptime] | |
19 | [-c command] [-y ttystr] [-e ltimeSent] [-r rc] | |
20 | ||
21 | fmach is a single letter. | |
22 | ttystr is the full name, e.g. /dev/tty0 | |
23 | ltimeSent is number of secs since TIMEBASE in decimal. | |
24 | lutmptime is the login time from utmp in OCTAL in the old protocol | |
25 | and in decimal in the new protocol. | |
26 | rc is the decimal return code (exit code>>8) of the command. | |
27 | command and ltimeSent are optional. | |
28 | ||
29 | There is duplication in this argument list. | |
30 | See the note in mmail.c about this stuff. | |
31 | ||
32 | Mwrite must be setuid bin or setuid root, to get in group 0, | |
33 | on the CC machines, in order to write on the user's terminal. | |
34 | ||
35 | Exit Codes: | |
36 | Returns 0 if the writing on the terminal works. | |
37 | Returns the return code of the mmail program if this is mailed. | |
38 | */ | |
39 | # include "defs.h" | |
40 | jmp_buf env; | |
41 | main(argc,argv) | |
42 | char **argv; { | |
43 | long lutmptime, otime, ltimeSent, ltimeCur, ltimeElap; | |
44 | int alarmint(); | |
45 | FILE *file; | |
46 | int i; | |
47 | struct utmp *putmp; | |
48 | char buf[BUFSIZ],*s; | |
49 | char fromaddress[BUFSIZ], toaddress[BUFSIZ]; | |
50 | char ttynamestr[BUFSIZ], cmdstr[BUFSIZ], *stimeCur, stimeSent[20]; | |
51 | char src[10], stemp[BUFSIZ]; | |
52 | struct stat statbuf; | |
53 | ||
54 | debugflg = DBV; | |
55 | argv[argc] = 0; | |
56 | otime = 0; | |
57 | src[0] = 0; | |
58 | errno = 0; | |
59 | ||
60 | /* NO LONGER NEEDED */ | |
61 | strcpy(toaddress,argv[1]); | |
62 | strcpy(ttynamestr,argv[2]); | |
63 | sscanf(argv[3],"%lo",&lutmptime); | |
64 | sprintf(fromaddress,"%s:%s",longname(argv[4][0]),argv[5]); | |
65 | if(argc > 6)strcpy(cmdstr,argv[6]); | |
66 | else cmdstr[0] = 0; | |
67 | if(argc > 7)strcpy(stimeSent,argv[7]); | |
68 | else stimeSent[0] = 0; | |
69 | ||
70 | /* parse arguments */ | |
71 | for(i = 1; i < argc; i++){ | |
72 | if(argv[i][0] == '-') | |
73 | switch(argv[i][1]){ | |
74 | case 't': | |
75 | strcpy(toaddress,argv[++i]); | |
76 | break; | |
77 | case 'y': | |
78 | strcpy(ttynamestr,argv[++i]); | |
79 | break; | |
80 | case 'x': | |
81 | lutmptime = atol(argv[++i]); | |
82 | break; | |
83 | case 'f': | |
84 | strcpy(fromaddress,argv[++i]); | |
85 | break; | |
86 | case 'c': | |
87 | strcpy(cmdstr,argv[++i]); | |
88 | break; | |
89 | case 'e': | |
90 | strcpy(stimeSent,argv[++i]); | |
91 | break; | |
92 | case 'r': | |
93 | strcpy(src,argv[++i]); | |
94 | break; | |
95 | } | |
96 | /* it is important that this code ignore unknown flags | |
97 | so that options can be added w/o recompiling */ | |
98 | } | |
99 | ||
100 | ltimeSent=atol(stimeSent)+TIMEBASE; | |
101 | ||
102 | setjmp(env); | |
103 | alarm(0); | |
104 | signal(SIGALRM,alarmint); | |
105 | if(errno != 100 && ttynamestr[0] && ttynamestr[8] != 'x'){ | |
106 | alarm(100); | |
107 | putmp = getutmp(ttynamestr); | |
108 | if(putmp != NULL) otime = putmp->ut_time; | |
109 | /* | |
110 | debug("lutmptime %lo otime %lo",lutmptime,otime); | |
111 | */ | |
112 | if(otime != 0 && otime == lutmptime) { | |
113 | file = fopen(ttynamestr,"w"); | |
114 | if(file != NULL && fstat(fileno(file),&statbuf) != -1 | |
115 | && (statbuf.st_mode&02)){ | |
116 | alarm(0); | |
117 | if(src[0] != 0)sprintf(stemp,", R: %s",src); | |
118 | else stemp[0] = 0; | |
119 | ltimeCur = gettime(); | |
120 | stimeCur = ctime(<imeCur); | |
121 | stimeCur += 11; | |
122 | stimeCur[strlen(stimeCur)-9] = 0; | |
123 | fprintf(file, | |
124 | "\r\nMessage from %s at %s ...\r\n", | |
125 | fromaddress, stimeCur); | |
126 | if(cmdstr[0] != 0){ | |
127 | s = ctime(<imeSent); | |
128 | s[strlen(s)-6] = 0; | |
129 | ltimeElap = ltimeCur - ltimeSent; | |
130 | fprintf(file, | |
131 | "(command: %s%s, sent %s, took %s)\r\n", | |
132 | cmdstr,stemp,s,comptime(ltimeElap)); | |
133 | } | |
134 | while(fgets(buf,BUFSIZ,stdin) != NULL){ | |
135 | fputs(buf,file); | |
136 | fputc('\r',file); | |
137 | } | |
138 | fprintf(file,"------\r\n"); | |
139 | exit(EX_OK); | |
140 | } | |
141 | } | |
142 | } | |
143 | ||
144 | /* well, couldn't write to him, so we'll mail to him on this mach */ | |
145 | /* mail to "toaddress", saying its from "fromaddress", about a command | |
146 | "cmdstr", which was sent at time "stimeSent" */ | |
147 | ||
148 | alarm(0); | |
149 | sprintf(stimeSent,"%ld",ltimeSent); | |
150 | if(cmdstr[0] != 0){ | |
151 | if(src[0] != 0) | |
152 | mexecl(MMAILCMD,"mmail", "-r",src, "-c",cmdstr, | |
153 | "-e",stimeSent,"-f",fromaddress, | |
154 | "-t",toaddress,"-z",0); | |
155 | else | |
156 | mexecl(MMAILCMD,"mmail", "-c",cmdstr, "-e",stimeSent, | |
157 | "-f",fromaddress, "-t",toaddress,"-z",0); | |
158 | } | |
159 | else | |
160 | mexecl(MMAILCMD,"mmail", "-f",fromaddress, "-t",toaddress, | |
161 | "-z", 0); | |
162 | perror(MMAILCMD); | |
163 | exit(EX_UNAVAILABLE); | |
164 | } | |
165 | alarmint(){ | |
166 | errno = 100; | |
167 | signal(SIGALRM,SIG_IGN); /* alarm off */ | |
168 | longjmp(env,0); /* ugh */ | |
169 | } |